Oil burner



Sept. 18, 1923. lAATW w. F. RAVENOR OIL BURNER Filed Deo. 17, 1921 Patented Sept. 18, 1923.

meant' seater Series.

wILraIn FRANCIS RAvnNoR, or vnNeoUvnR, BRITISH coLUMBIA, CANADA.

oIL BURNER. l

Application filed December 1.7,'1922. Serial'o. 523,194.

To all whom t may concern: i Be it known that I, VILFRID FRANCIS RAvnNon, a subject -ofthe King of Great Y Britain, residing at the city of Vancouver,

in construction and capable of being manu- Vfactured at a comparatively low cost, which is highly eliicient in operation and does not backfire nor readily choke, since carbon dcposit in the generator is prevented, and in which the possibility of leakage when cold is eliminated. VAfurther object is `to provide a burner ofthis character'which is air cooled throughout and in which the oil is practically boiled in bulk before entering theV generator proper,.while a still further object is to devise an oil burner capable of being formed of separate sections bolted together and thus permit of burners of different lengths being easily, quickly, and cheaply assembled ready Vfor use.

I attain these objects by the construction illustrated in the accompanying drawings in whichl Fig.A l is a side elevation of a burner.

Fig. 2 isa longitudinal sectional elevation of the saine. Fig. 3 is a plan' view.

Fig. 4 is a cross section taken through a burner section, showing the vair passages.`

Fig. 5 is an outside view of aburner sec tion, looking on the end.

Fig. 6 is a detail Aview of the gas valve. Fig. Tis an enlarged fragmentary view showing the valved end of the fuel injection pipe, in cross section.

VSimilar figures of reference indicate similar parts throughoutthe several views.

The burner proper, indicated by the numeral l, consists of a number of sections bolted or otherwise securedtogether, and as these sections are similar'to one another it.will 'be sufficient, therefore, to describe one of them specifically. Such a section is shown in Figs. 4;and 5 and consists of a thin boX-likefcasing 2, substantially rectangular in cross section, although it may be anyV other suitable form, through which extendscentrally an opening?) on each Aside of which and separated therefrom by walls 4: and 5 areair passages 6 and 7, these passages extending vertically through the section from the bottom to the top of the same and being widened at the top end, as at 8 in Fig. 4. The upper edge of the section intermediate its width is depressed to form a concave depression 9, while through the solid portion of the section above and below the opening 3 respectively extend bolt holes V1O-ll and l2-18, as shown more particularlyv in Fig. 5( Thus,.when a number of sections similar to that described in the foregoing are placed together face to face, separated, however, by upper and lower wires 14 and 15 of small diameter which are first of all inserted between them, they may be all secured together by means of the bolts 16-17 and l8-l9 passed through the bolt holes lO-ll andllQ-l so that a complete burner l is formed consisting of a plurality of connected sections and having an interior gas chamber, indicated generally by the numeral 20, formed by the openings 3 of the independent sections, which' gas chamber is in communication with the atmosphere through the slits 2l provided between the sections through the insertion of the spacing wires lll and 15 therebetween. s the concave,dep'ressions 9 of the respective assembled sections all register one with the other the complete burner is therefore provided in its upper surface with a substantially concave trough, indicated generally by the numeral 22 in Fig. 3, which trough extends throughout the whole length of the burner, and due to the provision of the vertical air-passages 6 and 7 in each section the entire burner is air cooled throughout.

Itshould'be mentioned here that each end section of a complete burner so formed has its outer face solid, as at 23 and 24e in Fig. 2, the end section remote from the fuel supply pipe being provided, however, with a funnel shaped member 25 the lower end of which extends through the wall 24E of the section into the gas chamber 2O and through which funnel extends vertically a valve stem 26 the lower end of which is connected to a suitably mounted valve operating lever 27 used for opening and closing the valve provided on the upper end of the stem, as will be more fully described hereinafter.

The Oenerator, indicated generally by the numeral 28, consists of a pipe 29V mounted centrally ofthe trough 22 and supported in close proximity to the bottom of the, trough by a vertically extending bracket 30 secured to the end section Wall 23, which pipe extends longitudinally of the burner and projects beyond it at its opposite ends, and at the end remote from the fuel supply pipe 3l the pipe is closed while itsopposite end is doubled over upwardly to form a return bend 32 andextended to provide a continuation of the loiver pipe, this upper pipe, `indicated by the numeral 33, extending about halfthe length of the burner and having its end closed by a cap 3l pro iidedvivith a.V threaded central bore 35 through which extends a correspondingly threaded stem 36 the innerl end of which is formed as a valve 3T, of mitred or otherconstruction. rlhis valve 3T co operates with a valve seat 38 formed in the end of the fuel injection pipe b9, which pipe passes centrally through the upper pipe of the generator and extends exteriorly of it at the endopposite to the capped end, as at 40, so that it may be connected to the fuel supply pipe 3l.

, The lower generator pipe 29 is filled for the greater part of its length from the return bend end with particles 4l of absorbent material such as burnt lireclay, and adjacent its closed end and centrally of the upper end of the funnel 25 an apertured boss 42 is formed extending interiorly and exteriorly of the pipe, as shoivn in Fig. 2, the aperture of which is fitted with a sleeve, indicated by the numeral #i3 in Fig. G, having a circular parallel bore which forms a valve seat 44C adapted to Vco-act with a tapered squared end 45 provided on the upper end of the valve stem 26 and ivhich end Ll5 acts as a valve to regulate the passage of gas through the aperture of the boss 42 when raised or lowered by the operation of the lever 27, or any other equivalent device.

'The generator pipe 29, and 33, is preferably exteriorly threaded, thus thinning the pipe Walls so that theV heat may the more readily pass therethrough Without excessive ly weakening the pipe and at the same time providing a muchy greater heating surface than if the pipe were plain and Unthreaded although it may be made so, if desired.

a6 indicates a hood enclosing the funnel 25, Which hood is, however, open at the bottom, as shown in F ig. 2. 1

The manner in which the burner operates may be briefly described, it being understood that the device when in use is placed in the firebox of a stove, fireplace, boiler, or the like. The generator is first of all preheated by burning a small quantity of fuel in the trough 22, which fuel may be carried by Wick, asbestos, or such like material. When the generator is sufficiently hot the fuel is admitted into the generator from the naeaaiv fuel pipe 3l and, on the valve 45 being opened the requisite amount, passes in the form of combustible gas into the funnel 25 and the gas chamber 2O so that it may be lighted at the slits 2l, continuing then to burn as long as tlie'psupply of fuel from the pipe 3l is maintained.

VIt should be particularly noted that, when the burner is cold, the valve 37 formed on one end of the stem 36 is permanently tightly seated on the valve 38 formed in the-end of the fuel injection pipe 89. However, as the fuel injection piperis colder than the pipe 33 and cap Sel 'when the burner is in use, the cap will expand to a greater extent than the pipe 39 so that the valve 37 will be automatically opened by such expansion sufficiently to permit the passage of fuel therethrough into Vthe pipe 29, automatically closing hoivever by the contraction of thecap as the burner cools.V The particles of fireclay al act as aretarding absorbent Wick and also prevent carbondeposit in the pipe 29, the deposit of .carbon being further prevented by projecting the return bend 52 beyond the end of the burner so that this part of the generator is maintained'comparatively cool and scorching of the oil is eliminated. Y

lt will be noted further that the needle valve -lopens externally, that is, it opens away from the pressure so that the gas issues through the aperture or seat L)el with the most efficient velocity of jet, which is not decreased as the'valve closes, as isithe case wherev the valve opens internally or on the pressure side of the orifice, and further, the valve il5 being square in cross section instead of the circular construction 'usually found in burners at the present time, it seats itself evenly when Vclosed all around the circular seat so that the fioivv of gas is even all around the valve stem, thus eliminating the possibility of the valvempressing on one side only of the seat and allo'vv'ing the gas to escape atthe other side, as frequently happens where circular type needle valves are employed.

rlhe provision of the vertical air passages in each burner section, besides ensuring the air cooling of the burner, also provides aneffective. means of distributing the heat, since the air draughttravelling through the passages Von its way to theV chimney con-v veys the heat units from the burner through the flues and around the oven.

From the foregoing it vill be seenthat l have provided an oil burner Which is siniple in construction and highly eflicient in operation.

That l claim as my invention is:

l. An oil burner comprising a plurality of centrally apertured sections connected'to- Vgather With the. apertures of vthe sections in registration whereby, aV chamberis formed 1n the burner interior, each said section being providedwith air passages on each side of its apertures, meansfor spacing the con-V nected sections from each other, and means for supplying gas tothe chamber.

2. VAn oil burner comprising va plurality of centrally apeitured spaced Sections connected together with the apertures of the sections in'registration whereby a chamber is formedin the burner interior, an externally threaded generator `pipe extending longitudinally of the burner in proximity to its uppersurface having a valved orifice adjacent one end, `a funnel shaped nozzle the upper end ofwhich is concentric with the said orifice while its lower end extends into the said chamber, a needle valve partially closing said orifice having its stem exf tending vertically through the funnel, and means for supplying fuel to the said gener ator pipe. l

3. An oilburner comprising a plurality of centrally apertured spaced sections connected together with the apertures of the sections in registration whereby a chamber is formed in the-burner interior, an exterl Vnally threadedv generator pipe extending longitudinally V.of the burner in proximity 'to its upper surface having -an orifice adjacentv one end provided withV a sleeve having a round bore forming a valve seat, a funnel shaped nozzle the upper end of which isl concentric with the said seat While its lower end extends into thesaid chamber, a valve stem extending vertically through said funnel having its upper end tapered and squared to form a valve adapted toreo-act Yfio with the said round seat for regulating the gas flow through the orifice, means for operating said valve stem, and means for supplying fuel to the generator pipe.

4. An oil burner comprising a plurality of centrally apertured spaced sections connected together with the apertures of the sections in registration whereby a chamber is formed in the burner interior, an externally threaded generator pipe extending longitudinally of the burner in proximity to its upper surface having a valved orifice adjacent one end and a fuel inlet at its opposite end, particles of a catalytic agent within said generator pipe lbetween the fuel inlet and the orifice, and means for directing gas discharged from the orifice into the chamber. A Y

5. An oil burner comprising a plurality of centrally apertured spaced sections connected together with the apertures of the sections in registration whereby a chamber is formed in the burner interior, an externally threaded generator pipe extending longitudinally of the burner in proximity to-its upper surface having'a valved orifice adjacent one end its opposite end being doubled over on itself and extended intermediate the length of the burner, the end of the said extended portion being capped, a fuel injection pipe within said extended portion having its inner end extending adjacent said cap and formed as a valve seat, a valve stem extending through said cap having its Vinner end formed as a valve and seated on nected together with the apertures and depressions of the sections in registration whereby a chamber is formed in the burner interior and a longitudinally extending concave trough is formed in the burner upper surface, each said section being provided with air passages on each side of its aperture and the opposite end sections of the burner each having a solid outer wall so that the chamber is closed as to its Opposite ends, wire distance pieces inserted between each section above and below the section aperture whereby slits extending from the chamber, exteriorly of the burner are provided, an externally threaded generatorpipe extending longitudinally oil' the burner within said trough having an orifice adjacent one end provided with a sleeve having a round bore forminga valve seat and being doubled over on itself at its opposite end and extended intermediate the length ofthe burner, the end of therextended portion being capped, a fuel injection pipe Within the said extended portion having its inner end extending adjacent said cap andV formed, as a valve seat, a valve stem extending through said cap having its inner Vend'formed as a valve and seated on said seat, a funnel shaped nozzle having its upper end disposed under and concentric with the generator pipe orice and its lower end extending into the burner chamber', and a valve stem extending vertically through said funnel having its upper end tapered and squared to form a valve co-acting with the said round seat ofthe orifice, to partially close Vthe same.

` 7. in an oil burner, a generator comprising a main pipe member having a valved orifice adjacent one end and doubled over` on itself at the opposite end and extended intermediate the length of the main pipe memben' the end of said extension being closed, a central fuel injection pipe within said extension having its inner end disposed adjacent said closed end and formed as a valve seat its opposite end being adapted for connection to a fuel supply, and a valve stem extendingthreugh the closed end having its inner end formed as a valve co-acting with said valve seat te open'and close the same. j.

l 8. In an oil burner, a generator comprising an externally threaded main pipe niember having a valved orifice adjacent one end and doubled over on itself at the opposite endv and extended intermediate the length of the main pipe member, said extension being also externally threaded and having its end closed, a central fuel injection 'pipe Within said extension having its inner end disposed adjacent said closed end and formed asa valve seat its opposite end being adapted -for connection to a fuel supply, and a valve stein extending through the closed end having its inner end formed as a valve co-acting with said valve seat to open and close the saine.

9. In an oil burner7 a generator comprising a main pipe member having a valved orifice adjacent one end and doubled Yover on itself at its opposite end and extended intermediate the length of the inain pipe member, the end of said'extension being closed by a cap, a central fuel injection pipe Within said extension having its inner end disposed adjacent said cap and formed as a valve seat its opposite end beingadapted for connection to a fuel supplyv and a -valve stem extending through the cap havingits inner end formed as a valve coacting with said valve seat, said valve being adapted to seat and unseat itself automatically through the contraction and expansion respectively of the said capped extension.

10. ln an oil burner, a main generator pipe, an auxiliary generator pipe, an inter nal fuel injection pipe disposed above the inainpipe and extending'centrally into the auxiliary generator pipe. and an elbow connecting said auxiliary generator pipe with the main generator pipe at one end and acting as a return andbeing projected the end ofsaid burner.

l1. In an oil burner, amain generator pipe, an auxiliary generator pipe, an internal fuel injection pipe disposed above the main pipe and extending centrally into the auxiliary generator pipe, an elbow connectingsaid auxiliary` generator pipe with the main generatorpipe at one end and acting as a return and being projected beyond the end of said burner, and a catalytic agent Within the said inain generator pipe.

l2. In an oil burner, an externally threaded main generator pipe, an externally threaded auxiliary generator pipe disposed above the main pipe in communication therewith and into which extends centrally an internal fuel injection pipe.'

13. In an oil burner, an externally threaded main generator' pipe, an externally threaded auxiliary generator pipe disposed above the main pipe communicating therewith at one end and capped at its opposite end, an internal fuel injection pipe extending centrally into the` auxiliary Ypipe having its inner end formed as a valve seat'and disposed adjacent the said capped end, and a falve carried by said cap seatedV in the valved end of the said injection pipe..`

beyond 14; In a. sectional oil burner, asection' consisting of a thin box-like casing having a central aperture and Vair passages extending vertically through the casing on each side of the aperture.

` ln testimony whereof I aliix my signature at the city of Vancouver, B. @.Canadzu this th Vday of November, 1921'.

Winriun renners envianos. 

